I don't believe the problem has anything to do with a corrupt CD. I just tried for the first time 5.0.1 after downloading. And got the same error message. I then tried my copy of 4.0.2 that worked perfectly on my old rig yet recieved the same error on my current system. Perhaps there is some incompatability with this system. I am currently running a Asus P5B deluxe with a Intel 6400.

Mr Ranger